fix: spool edit form overwrites usage-tracked weight

When editing a spool (changing note, color, etc.), the form always sent
weight_used back to the server. If the React Query cache held a stale
pre-print value, saving would silently reset remaining weight to full.

Track whether the user explicitly touched the weight field and only
include weight_used in the PATCH request when creating a new spool or
when the weight was intentionally changed.

CHANGELOG.md

@@ -33,6 +33,7 @@ All notable changes to Bambuddy will be documented in this file.
 - **Archive List View Not Labeling Failed Prints** ([#365](https://github.com/maziggy/bambuddy/issues/365)) — The archive grid view displayed a red "Failed" / "Cancelled" badge on failed and aborted prints, but the list view had no equivalent indicator. Now shows an inline status badge next to the print name in list view.
 - **Reprint Fails with SD Card Error for Archives Without 3MF File** ([#376](https://github.com/maziggy/bambuddy/issues/376)) — When a print was sent from an external slicer and Bambuddy couldn't download the 3MF from the printer during auto-archiving, the fallback archive had no file. Attempting to reprint such an archive tried to upload the data directory as a file, causing a confusing "SD card error." The backend now returns a clear error for file-less archives, and the frontend disables Print/Schedule/Open in Slicer buttons with a tooltip explaining that the 3MF file is unavailable.
 - **Inventory Spool Weight Resets After Print Completes** — After a print, the usage tracker correctly updated `weight_used` (e.g., +1.6g), but periodic AMS status updates recalculated `weight_used` from the AMS remain% sensor and overwrote the precise value. For small prints on large spools (e.g., 1.6g on 1000g), the AMS remain% stays at 100% (integer resolution = 10g steps), resetting `weight_used` back to 0. The AMS weight sync now only increases `weight_used`, never decreases it, preserving precise values from the usage tracker.
+- **Spool Edit Form Overwrites Usage-Tracked Weight** — Editing any spool field (note, color, material, etc.) sent the full form data back to the server, including `weight_used`. If the frontend cache was stale (e.g., loaded before the last print completed), saving the form would silently reset `weight_used` to the pre-print value, reverting the remaining weight to full. The form now only includes `weight_used` in the update request when the user explicitly changes the weight field.
 - **Loose Archive Name Matching Could Cause Wrong Archive Reuse** ([#374](https://github.com/maziggy/bambuddy/issues/374)) — The `on_print_start` callback used `ilike('%{name}%')` to find existing "printing" archives, which meant a print named "Clip" could incorrectly match "Cable Clip" or "Clip Stand". This could cause a new print to reuse the wrong archive or skip creating one. Tightened to exact `print_name` match or exact filename variants (`.3mf`, `.gcode.3mf`).
 - **Archive Duplicate Badge Misses Name-Based Duplicates** ([#315](https://github.com/maziggy/bambuddy/issues/315)) — The duplicate badge on archive cards only matched by file content hash, so re-sliced prints of the same model (different GCODE, same print name) were not flagged as duplicates. Now also matches by print name (case-insensitive), consistent with the detail view's duplicate detection.
 

frontend/src/components/SpoolFormModal.tsx

@@ -35,6 +35,7 @@ export function SpoolFormModal({ isOpen, onClose, spool, printersWithCalibration
   const [formData, setFormData] = useState<SpoolFormData>(defaultFormData);
   const [errors, setErrors] = useState<Partial<Record<keyof SpoolFormData, string>>>({});
   const [activeTab, setActiveTab] = useState<TabId>('filament');
+  const [weightTouched, setWeightTouched] = useState(false);
 
   // Cloud presets
   const [cloudAuthenticated, setCloudAuthenticated] = useState(false);
@@ -195,6 +196,7 @@ export function SpoolFormModal({ isOpen, onClose, spool, printersWithCalibration
       }
       setErrors({});
       setActiveTab('filament');
+      setWeightTouched(false);
     }
   }, [isOpen, spool]);
 
@@ -208,6 +210,7 @@ export function SpoolFormModal({ isOpen, onClose, spool, printersWithCalibration
   // Update field helper
   const updateField = <K extends keyof SpoolFormData>(key: K, value: SpoolFormData[K]) => {
     setFormData(prev => ({ ...prev, [key]: value }));
+    if (key === 'weight_used') setWeightTouched(true);
     if (errors[key]) {
       setErrors(prev => ({ ...prev, [key]: undefined }));
     }
@@ -333,7 +336,6 @@ export function SpoolFormModal({ isOpen, onClose, spool, printersWithCalibration
       rgba: formData.rgba || null,
       label_weight: formData.label_weight,
       core_weight: formData.core_weight,
-      weight_used: formData.weight_used,
       slicer_filament: formData.slicer_filament || null,
       slicer_filament_name: presetName,
       nozzle_temp_min: null,
@@ -341,6 +343,12 @@ export function SpoolFormModal({ isOpen, onClose, spool, printersWithCalibration
       note: formData.note || null,
     };
 
+    // Only send weight_used when creating or when explicitly changed by the user.
+    // This prevents stale cached values from overwriting usage-tracker data.
+    if (!isEditing || weightTouched) {
+      data.weight_used = formData.weight_used;
+    }
+
     if (isEditing) {
       updateMutation.mutate(data);
     } else {

static/index.html

@@ -23,7 +23,7 @@
 
     <!-- Splash screens for iOS -->
     <link rel="apple-touch-startup-image" href="/img/android-chrome-512x512.png" />
-    <script type="module" crossorigin src="/assets/index-DLlMitUB.js"></script>
+    <script type="module" crossorigin src="/assets/index-DDGLa0P-.js"></script>
     <link rel="stylesheet" crossorigin href="/assets/index-VlqasY_r.css">
   </head>
   <body>